Anxious to develop an environmentally friendly and integrated wind power project in the bay of Saint-Brieuc, Ailes Marines has set up a team of engineers and doctors specializing in the environment.
They work daily on the implementation of environmental studies and obtaining the regulatory authorizations required for the project.

A few examples among the thirty or so measures implemented

The sequence " avoid, reduce, compensate " (ARC) is intended to avoid environmental damage, to reduce damage that could not be sufficiently avoided and, if possible, to compensate for significant effects that could neither be avoided nor sufficiently reduced.
It applies to projects and plans and programs subject to environmental assessment as well as to projects subject to various procedures under the environmental code (environmental authorization, derogation from species protection, Natura 2000 impact assessment, etc.).

All impacts are assessed through a monitoring programme that focuses on all compartments (physical, chemical, biological, use). In addition, some accompanying measures are implemented to improve local knowledge.


Accompanying measures

- R&D programme for the assessment of the impact of underwater noise generated during work on the fisheries resource
- Turbidity modeling in the work phase
- Viewpoints and information panels
- Definition and implementation of a tourist offer in collaboration with the actors of the territory.

Reduction and avoidance measures

- Reducing disturbance of the Balearic Shearwater in periods of interbreeding presence
- Photoattraction reduction in construction

Action Items

- Monitoring of breeding colonies
- Monitoring of marine mammals and birds by boat and plane (high-definition cameras)
- Acoustic monitoring of marine mammals using hydrophone acoustic stations
Tracking birds by ground radar at Cape Fréhel
- Monitoring of the fishing resource (fish, bivalves, cuttlefish...)
- Monitoring of benthic biocenoses and sediment quality
- Turbidity modeling in the work phase

Compensation measures

- Regulation of bird egg predation on Tomé Island by American mink
- Regulation of egg predation on Cape Frehel
- Marine Mammal Awareness Area

The environmental studies carried out as part of the project


The impact study and initial status

In 2015, an initial assessment of the marine environment was carried out as part of the impact study. This initial state is based on observations made from 2012 to 2015. The environmental studies carried out for the initial state concerned the physical environment (current, tide, geology, water quality, etc.) and the living environment (marine flora and fauna, birds and bats, etc.), but also the natural and heritage environments, the landscape and the socio-economic aspects.
April 2017
April 2017

The AU-IOTA Single Authorization

On 18 April 2017, the wind farm off the coast of the Bay of Saint-Brieuc, carried by Ailes Marines, obtained the administrative authorisation known as "Autorisation Unique IOTA". This authorisation was issued by the Côtes-d'Armor Prefecture, under the provisions of Articles L.214-1 et seq. of the Environmental Code, and prescribes several follow-up, reduction, compensation or accompanying measures.
October 2017
October 2017

Actions followed locally

The actions carried out by Ailes Marines as part of the environmental measures are monitored and evaluated by a Management and Monitoring Committee. This committee was created specifically for the wind farm by prefectural order of 30/10/2017, and chaired by the prefect of the Côtes d'Armor. It is mainly composed of representatives of the State, local authorities, Natura 2000 sites, professional fishermen, nature reserves. The latter can rely as much as necessary on the expert opinions of the Scientific Council created for the park.
Since 2017
Since 2017

Diversified environmental measures

With a view to limiting and monitoring the impact of the construction and operation of the park on the environment, Ailes Marines is implementing numerous monitoring, reduction and compensation measures.

Research and Development

Participation of recognized experts

Ailes Marines has surrounded itself with numerous experts to carry out quality monitoring.
Two research programs on the incidence of noise were launched in 2018/2019 on scallops, prairie and cuttlefish. They are led by Laurent Chauvaud from the CNRS and Michel André from theUniversity of Barcelona. These programmes, at the cutting edge of research, will provide a better understanding of the impact of noise in the context of the Saint-Brieuc project.
A world first, they will be useful for the entire profession and for the Marine Renewable Energy sector.

Research support

Ailes Marines wanted to support research for the marine environment by getting involved with local actors.

For example, the RESIBAD project aimed to develop expertise and operational tools for the characterization and validation of underwater noise reduction devices.

This project has improved the understanding of the effects of bubble curtains on sound wave propagation.

The Environmental Management System

The project is governed by an Environmental Management System (EMS) adapted to the specificities of the offshore wind activity. The Environmental Management System of IBERDROLA Renewables Offshore is based on the international standard for environmental management: ISO 14001:2015. The proper functioning of this system ensures the prevention of the risk of environmental accidents during all phases of the project, as well as the continuous improvement of the environmental performance of the project.

The Marine Mammal Booklet

The Balearic Shearwaters' Booklet

Pro Area


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